Machine for facing the bearings of connecting rods



June 30, 1925. 1,544,361

A. H. WADELL MACHINE FOR FACING THE BEARINGS CONNECTING RODS Filed May28, 1924 2 Sheets-Sheet 1 w plilv ]NVENTOR. W11.

AT ORNEY.

June 30, 1925. 1,544,361

A. H. NADELL MACHENE FOR FACING THE BEARINGS OF CONNECTING RODS FiledMay 28, 1924 '2 Sheets--Sheet 2 INVENTOR. W77.

PatentedJune 30, 1925.

UNITED STATES ALBERT H. WADELL, or NEWARK, NEW JERSEY,

MACHTNE FO'R FACING THE BEARINGS OF CONNECTING RODS.

Application filed May 28, 1924. Serial No. 716,390.

To all whom it may concern.

Be it known that I, ALBERT H. VADELL,

a citizen of the United States, and a resident of Newark, county ofEssex, and State of New Jersey, have invented certain new and usefulImprovements in Machines for Facing the Bearings of Connecting Rods, ofwhich the following is a specification.

This invention relates to an improved machine for facing the bearings ofconnecting rods and while the machine is adapted for other purposes,that is, it can be used in facing articles other than connecting rods,it will be described herein as a machine particularly adapted for facingthe bearings of connecting rods.

The machine is one in which the connecting rod is supported so that itcan be rotated as a crank, being supported so that it can freely revolvethe supporting :means of the connecting rod projecting from one face ofthe machine so that a tool mounted in the fixture can be adjusted alongthe face of the connecting rod so as to finish it and the tool beingalso adjustable when necessary to adjust it to vary the penetration ofthe tool into the material on which it is operated.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a face view of the machine made according to my inventionwith a connecting rod mounted on it. Figure 2 is a top view with thetool and tool holder removed. F igure 3 is a vertical section on a largescale on line 3-3 in Figure 1. Figure 4 is a section on line 4-4 inFigure 3. Figure 5. is a front view of the tool holder removed from thefixture and with the tool mounted therein. Figure 6 is a bottom view ofthe tool holder with the tool in it. Figure 7 is a perspective view ofthe tool used with the tool holder. Figure 8 is a perspective view ofone of the jaws in the expansible mandrel. Figure 9 is a detail sectionshowing the tool operating on the face of the connecting rod bearing andFigure 10 is a detail perspective showing how the tool is used forfinishing and rounding the inner edge of the bushing in the bearing.

The machine is mounted usually 011 a workbench 10 and is fixed in placeso that it is rigid so that it retains its place under the leverage ofrotating the connecting rod against the tool. The device comprises afixture 11 which has a bearing 12 in the lower portion and standards 13at the side above the bearing and a cap 13 at the top.

The bearing is used for mounting a freely rotating expansible mandreland in the form shown the shaft 14 is held against longitudinal movementat one end by a nut 15 and at the'other end by the collar 16 of themandrel, the shaft having on its outer end a collar 17 which is movablealong the mandrel and can be forced inward by the nut 18 on thescrew-threaded end 19 of the shaft 14. v

The faces of the collars 16 and 17 incline inwardly, that is, theyconverge toward the centre of the mandrel and are slotted as at 20. Ineach of these slots is a jaw 21 with ends 22 inclined to fit the angleof the collars 16 and 17 so that when the nut 18 is screwed on, the jawsall move outward and are thus adapted to'grip the inner wall or face ofthe bushing 23 and the bearing 24 of the connecting rod' 25, the insideof the bushing having been rounded and being thus accurately centredwhen the jaws 21 are forced outward in contact with it.

To provide for the free and easy rotation of the connecting rod it isusual to project the handle 26 from the small bearing 27 on theconnecting rod so that the handle 26 permits the rotation of theconnecting rod as a crank. The tool that is to face the end of thebushing 23 or, if there is no bushing, to face the bearing 24 is mountedin a fixture, usually in a tool holder 28, the tool 29 being slidable inthe tool holder being arranged in a slot which is closed at the bottomby a plate 30 held on by screws 31.

The tool holder 28 is raised and lowered by the screw 32 which passesthrough a screw-threaded opening 33 in the cap 13- and has a wheel 34for turning it. The collar 35 at the end of the screw is fastenet by thenut 36 so that the collar raises and lowers the tool holder 28 as thescrew 32 is turned. The tool holder slides between the uprights 13 andis prevented from turning by having its front and rear edges 37projecting slightly to the side at the front and back of the fixture.

The tool is moved in the tool holder by the screw 38 operating in thescrew-threaded opening 39 in the tool holder 28 and having a collar 40rotating in the notch 41 in the back end of the tool 29.

The tool to finish the bearings is preferably made with a substantiallyperpendicular cutting edge 42 which projects from the ing the wheel 34and the screw 38 to give the proper travel and penetration to the tool.i g

WVhen thetool is approaching the inner edge of the hearing if it is tobe rounded as shown in Figure 10, the tool canbe' ad vanced by the screw38 and also by the screw 32 when necessary to cause the rounded edge 43'ofthe cutter to provide the rounded finished corner at the ends of theIt will be evi ent, therefore, from this description that when a bearingor a connecting rod is to be faced it is placed on the freely revolvablemandrel and while the workman turns the connecting red as a crankat oneend, he makes such ads vances andadjnstfments through the handle 34 andthe screw 3;8-to cause thetoolto finish the face of the bearing to thedesired degree and when the work is finished by retreating the nut18fthe jaws of the mandrel areretreated and the. connecting rod isremoved from the device. r

\Vhen the connecting rod is removed from the m'andrel'th'e jawsl2l arekept from falling out by a spring which is very light for the, reasonthat it does not resist the expansion of the jaws 21 and is only strongenough to hold them against the collars 16 and 17. l

1. A machine for facing the bearings of rod comprising a fixture, a

a freely rotatable mandrel rejecting from r the front thereof to clamp tIeinsi'de of the bearing of the connectingirod, a"tool, and

an adjustable toolholder to hold the tool on the rear face of the saidbearing whereby when the bearing on the mandrel is rotated as a crankthetool can be caused to traverse the face of the bearing.

3. A machine for facing the bearings of a connecting rod comprising afixture, a tool holdenadjustable in the fixture a tool in the holder,and a freely r'otatab e mandrel on the fixture and projecting beyond thetool whereby a connecting rod bearing can embrace the mandrel so thatwhen the connectin'g rod is operated as a crank the tool can be adjustedto operate on -the face of the bearing.

4) A machine for facing the bearin of i a connecting rod comprisin afixture avring a hori zonta l bearing t erein, a freely rotatable 'shaftin the bearing fa-n exp ansi-t ble mandrel on the plpjecting end of theshaft, a tool in the tool holder, a tool-holder adjustable vertically,and means fQ! horizontally adjusting the tool in the holder. I I

In testimony that I claim the foregoing I have hereto set my hand thMay, 1924.

ALBERT H. XVADELL.

is 27th day of

